EP 1345062 A2 20030917 - Scanning optical system and image forming apparatus using the same
Title (en)
Scanning optical system and image forming apparatus using the same
Title (de)
Optische Abtastvorrichtung und damit versehenes Bilderzeugungsgerät
Title (fr)
Système de balayage optique et appareil de formation d'image utilisant ce système
Publication
Application
Priority
JP 2002068141 A 20020313
Abstract (en)
By setting the direction of arrangement of a fine structure grating, it is possible to reduce influence of the structural birefringence of a fine structure grating provided on an optical surface in a scanning optical system to provide a scanning optical system having good optical properties that is not depend on the polarization state of an incident light flux and to provide an image forming apparatus using the same. In the scanning optical system, a light flux emitted from a laser light source 1 is deflected by deflecting means and the light flux having been deflected by the deflecting means is imaged by scanning optical means 6 onto a surface 7 to be scanned so as to scan the surface to be scanned. The scanning optical means has at least one optical surface that has a fine structure grating 8 having a grating pitch smaller than the wavelength of the light flux emitted from said laser light source. The direction of arrangement of the fine structure grating is the same all over the surface of the fine structure grating. <IMAGE>
IPC 1-7
IPC 8 full level
B41J 2/44 (2006.01); G02B 13/00 (2006.01); G02B 13/18 (2006.01); G02B 26/10 (2006.01); G02B 26/12 (2006.01); H04N 1/036 (2006.01); H04N 1/113 (2006.01)
CPC (source: EP US)
G02B 26/125 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB IT NL SE
DOCDB simple family (publication)
EP 1345062 A2 20030917; EP 1345062 A3 20050330; EP 1345062 B1 20080806; CN 1249481 C 20060405; CN 1444068 A 20030924; DE 60322614 D1 20080918; JP 2003270569 A 20030925; JP 3870111 B2 20070117; US 2003174201 A1 20030918; US 6836281 B2 20041228
DOCDB simple family (application)
EP 03251318 A 20030305; CN 03120081 A 20030312; DE 60322614 T 20030305; JP 2002068141 A 20020313; US 37626703 A 20030303